i would not go much over 12.5 0r 13.5 either personnally.the effect would be a lot of overlap on the bead and if aired down could rip the tire on the bead against a rock or other object.plus it would look real funny.

I run 42x15x15 TSLs on 15x8 steels. Works great, though it would be pushing it pretty bad for a street rig. Off road I can air down to 6 lbs or so without blowing a bead (yet) and it helps protect the side walls (and rim/bead) since they do not bulge out so much when aired down. On the road, it would likely make it a bit squirmy and cause it to wear in the center...

Second set 16X38.5s on 8in.Like said makes them wear centers more on road.Been low as 4 psi with no probs.Think it protects sidewalls more on narrower wheel.Nephew ran 15X39s on 8in,no probs.Same tires on 10s would break down at 8-10 psi.{front}. /forums/images/graemlins/crazy.gif /forums/images/graemlins/truck.gif /forums/images/graemlins/thumb.gif

Like Sandman said, you can mostly correct it with air pressure, but you'll have to guess/experiment. Slightly lower pressure will keep the center from wearing as bad. But you don't want to go too low or you'll get heat, mileage, and squirm problems...

If you do more road miles than off.Get the wider wheels,prob get more milage from same tire ason narrow wheel.Tire will run flater tread and run cooler.Narrow wheel needs lower pressure for tread to stay flat,makes it flex more and builds more heat.I run 14-16 psi in 16X38.5X15s and tread still doesn't run flat.They stay on 8in wheel a little better at low press. /forums/images/graemlins/confused.gif /forums/images/graemlins/crazy.gif /forums/images/graemlins/truck.gifer /forums/images/graemlins/thumb.gif

Anyone got more input on this? I just picked up a set of 16x8" stock steelies (4.5" BS) and I was hoping to run 35x12.50's, but most of the stuff I've read says the biggest you can(should!?) go is 275/70/r16 which works out to a 10.50" or so. Basically, what's the reasonable point that most places would refuse to mount them?

This will be primarily trail usage with a little street (my 2 mile commute across town twice a day).

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